diff --git a/apps/api/tests/lib-url-fetch.test.ts b/apps/api/tests/lib-url-fetch.test.ts
index c7675bf..f5432a3 100644
--- a/apps/api/tests/lib-url-fetch.test.ts
+++ b/apps/api/tests/lib-url-fetch.test.ts
@@ -1,12 +1,17 @@
 import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
 import { fetchUrlContent } from '../src/lib/url-fetch.ts';
 
-function makeFetch(responses: Array<{ ok: boolean; json?: () => Promise<unknown>; text?: () => Promise<string> }>) {
+function makeFetch(
+	responses: Array<{ ok: boolean; json?: () => Promise<unknown>; text?: () => Promise<string> }>,
+): typeof globalThis.fetch {
 	let call = 0;
-	return vi.fn(async () => {
+	const fn = vi.fn(async () => {
 		const r = responses[Math.min(call++, responses.length - 1)];
 		return r as unknown as Response;
 	});
+	// Bun's `typeof fetch` includes a `preconnect`-method that vi.fn()
+	// doesn't have. Cast über `unknown` umgeht den strikten Type-Check.
+	return fn as unknown as typeof globalThis.fetch;
 }
 
 describe('fetchUrlContent', () => {
@@ -67,7 +72,9 @@ describe('fetchUrlContent', () => {
 	});
 
 	it('returns null when mana-search returns no content and direct fetch fails', async () => {
-		globalThis.fetch = vi.fn().mockRejectedValue(new Error('Network error'));
+		globalThis.fetch = vi
+			.fn()
+			.mockRejectedValue(new Error('Network error')) as unknown as typeof globalThis.fetch;
 
 		const result = await fetchUrlContent('https://example.com');
 		expect(result).toBeNull();